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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-28204] Recoverable Rollback: Add server parameter to select between 3.4 and 3.6 rollback implementations</title>
                <link>https://jira.mongodb.org/browse/SERVER-28204</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The 3.6 server will support two rollback implementations&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;A new implementation that is reliant on 3.6-only features to make rollback run more efficiently;&lt;/li&gt;
	&lt;li&gt;The existing implementation carried forward from 3.4 that will be used as a fallback in the case where the new rollback algorithm is unable to revert operations in the oplog generated by a 3.4 server.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;To support both implementations, a server parameter will be introduced to support the fallback behavior and to facilitate regression testing.&lt;/p&gt;</description>
                <environment></environment>
        <key id="361766">SERVER-28204</key>
            <summary>Recoverable Rollback: Add server parameter to select between 3.4 and 3.6 rollback implementations</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="benety.goh@mongodb.com">Benety Goh</assignee>
                                    <reporter username="benety.goh@mongodb.com">Benety Goh</reporter>
                        <labels>
                    </labels>
                <created>Mon, 6 Mar 2017 20:01:11 +0000</created>
                <updated>Fri, 23 Oct 2020 17:29:22 +0000</updated>
                            <resolved>Thu, 23 Mar 2017 23:19:29 +0000</resolved>
                                                    <fixVersion>3.5.5</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1531805" author="xgen-internal-githook" created="Thu, 23 Mar 2017 23:18:45 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28204&quot; title=&quot;Recoverable Rollback: Add server parameter to select between 3.4 and 3.6 rollback implementations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28204&quot;&gt;&lt;del&gt;SERVER-28204&lt;/del&gt;&lt;/a&gt; added build variant for Rollback 3.4 Enterprise RHEL 6.2&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/4cefb2925ab1fcb951777c25d80cd2df0b9f544e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/4cefb2925ab1fcb951777c25d80cd2df0b9f544e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1531746" author="xgen-internal-githook" created="Thu, 23 Mar 2017 21:54:06 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28204&quot; title=&quot;Recoverable Rollback: Add server parameter to select between 3.4 and 3.6 rollback implementations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28204&quot;&gt;&lt;del&gt;SERVER-28204&lt;/del&gt;&lt;/a&gt; added server parameter to select between 3.4 and 3.6 rollback implementations&lt;/p&gt;

&lt;p&gt;This server parameter is set to use the 3.6 implementation as the default.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/35a6f1920bf38d7b7df6962598e56fa456451152&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/35a6f1920bf38d7b7df6962598e56fa456451152&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1531668" author="xgen-internal-githook" created="Thu, 23 Mar 2017 20:20:26 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28204&quot; title=&quot;Recoverable Rollback: Add server parameter to select between 3.4 and 3.6 rollback implementations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28204&quot;&gt;&lt;del&gt;SERVER-28204&lt;/del&gt;&lt;/a&gt; added Rollback interface and 3.6 implementation&lt;/p&gt;

&lt;p&gt;This is a stub implementation of the new 3.6 rollback algorithm.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/42d945d2446e0ca0aef570ec090e4d93ede00618&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/42d945d2446e0ca0aef570ec090e4d93ede00618&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1531663" author="xgen-internal-githook" created="Thu, 23 Mar 2017 20:13:22 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28204&quot; title=&quot;Recoverable Rollback: Add server parameter to select between 3.4 and 3.6 rollback implementations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28204&quot;&gt;&lt;del&gt;SERVER-28204&lt;/del&gt;&lt;/a&gt; added RollbackTest fixture&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/c1964e817459a575a64609229a473d57d08aa4d0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/c1964e817459a575a64609229a473d57d08aa4d0&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1528479" author="xgen-internal-githook" created="Mon, 20 Mar 2017 18:33:49 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28204&quot; title=&quot;Recoverable Rollback: Add server parameter to select between 3.4 and 3.6 rollback implementations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28204&quot;&gt;&lt;del&gt;SERVER-28204&lt;/del&gt;&lt;/a&gt; migrate OplogFetcher to use AbstractAsyncComponent&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1f607d93a8554442572337e02a85d8ec3df74b42&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1f607d93a8554442572337e02a85d8ec3df74b42&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1528405" author="xgen-internal-githook" created="Mon, 20 Mar 2017 17:38:08 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28204&quot; title=&quot;Recoverable Rollback: Add server parameter to select between 3.4 and 3.6 rollback implementations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28204&quot;&gt;&lt;del&gt;SERVER-28204&lt;/del&gt;&lt;/a&gt; added AbstractAsyncComponent&lt;/p&gt;

&lt;p&gt;This defines the life cycle for task executor based async components in replication.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/4af23eb406571c1559ac4022c1c2fc27f00ae93f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/4af23eb406571c1559ac4022c1c2fc27f00ae93f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1528379" author="xgen-internal-githook" created="Mon, 20 Mar 2017 17:14:40 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28204&quot; title=&quot;Recoverable Rollback: Add server parameter to select between 3.4 and 3.6 rollback implementations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28204&quot;&gt;&lt;del&gt;SERVER-28204&lt;/del&gt;&lt;/a&gt; moved TaskExecutorMock out of initial_syncer_test.cpp into its own library&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/46dc518b4531b21a60675f7b9b1a9e82a50bbc0c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/46dc518b4531b21a60675f7b9b1a9e82a50bbc0c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1519337" author="benety.goh" created="Wed, 8 Mar 2017 20:21:13 +0000"  >&lt;p&gt;Proposed name for server parameter: use3dot4Rollback&lt;br/&gt;
See &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-24293&quot; title=&quot;Add evergreen variant that runs tests with 3.2 initial sync code&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-24293&quot;&gt;&lt;del&gt;SERVER-24293&lt;/del&gt;&lt;/a&gt; for naming convention used to select initial sync implementation between 3.2 and 3.4.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="1523720">SERVER-51819</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="284481">SERVER-24049</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="289459">SERVER-24293</issuekey>
        </issuelink>
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